“stumble.” The Hebrew text of Proverbs 3:23 is literally, “and your foot will not strike,” which would, by ellipsis, mean, “will not strike [“a stone” or “anything”]. The meaning is that your foot won’t stumble over anything. The metaphor of the foot not stumbling is a continuation of the general metaphor throughout the Bible of “walking” referring to living life. The context here in Proverbs 3:19-23 is saying that as you “walk” through life, if you use Wisdom, discernment, knowledge, sound advice, and discretion, you will not stumble, but will live your life in safety. The amount of suffering people go through due to not being wise is incalculable. The “safety” that the wise person experiences refers to generally being safe in this life, and also extends to the real safety of having everlasting life.